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CVE-2026-93568Io.netty/netty-codec-http2: io.netty/netty-codec-http3: netty: http/2 and http/3 extended connect requests are downgraded as regular connect requests

Red Hat Red Hat Build of Apache Camel 3.33.3.SP2; Red Hat Red Hat Build of Debezium 3.6; Red Hat Red Hat build of Keycloak 26.4; Red Hat Red Hat build of Keycl… Published: (1 month ago)

Description

A flaw was found in Netty. A remote attacker could exploit this vulnerability by sending specially crafted HTTP/2 or HTTP/3 Extended CONNECT requests. Netty's HTTP-object conversion path incorrectly processes these requests as regular HTTP/1.1 CONNECT requests, leading to a loss of critical protocol and path information. This misinterpretation can allow attackers to bypass security policies, such as routing or authorization logic, in applications that rely on Netty for HTTP/2 or HTTP/3 communication, resulting in integrity loss.

Weakness (CWE): CWE-20

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

VendorProductVersions
build keycloak 26.4 —
build keycloak 26.6 —
quarkus 3.27 —
quarkus 3.33 —
Red Hat Red Hat AMQ Broker 7 —
Red Hat Red Hat Build of Apache Camel 3.33.3.SP2 all versions
Red Hat Red Hat build of Apache Camel 4 for Quarkus 3 all versions
Red Hat Red Hat build of Apache Camel for Spring Boot 4 all versions
Red Hat Red Hat build of Apicurio Registry 3 all versions
Red Hat Red Hat Build of Debezium 3.6 —
Red Hat Red Hat build of Keycloak 26.4 all versions
Red Hat Red Hat build of Keycloak 26.4.17 —
Red Hat Red Hat build of Keycloak 26.6 all versions
Red Hat Red Hat build of Keycloak 26.6.8 —
Red Hat Red Hat build of Quarkus 3.27.5.SP2 —
Red Hat Red Hat build of Quarkus 3.33.3.SP2 —
Red Hat Red Hat Data Grid 8 all versions
Red Hat Red Hat Fuse 7 all versions
Red Hat Red Hat JBoss Enterprise Application Platform 7 all versions
Red Hat Red Hat JBoss Enterprise Application Platform 8 —
Red Hat Red Hat JBoss Enterprise Application Platform 8.1 —
Red Hat Red Hat JBoss Enterprise Application Platform Expansion Pack all versions
Red Hat Red Hat Single Sign-On 7 all versions

References and patches